AT&T MERLIN LEGEND Release 3.1 Installation Manual page 260

Upgrading the Control Unit
5 Replace the processor module. See Figure 9–3. Then go to Step 7.
NOTE:
If the processor module is to be modified for Key mode, perform Step 4
through Step 10 of "Modifying the Processor for Key Mode" before
proceeding.
a Press up on the tab at the bottom rear of the old processor module.
b While the tab is unlocked, pull the processor module towards you, and
then lift it straight up.
c Install a Release 4.0 processor module. See "Installing the Processor" in
Chapter 2.
d Power up the system.
6 Upgrade the processor module to Release 4.0 (when upgrading from
Release 3.0 or 3.1).
NOTE:
If the processor module is to be modified for Key mode, see "Modifying the
Processor for Key Mode" later in this chapter.
a. Insert an Upgrade memory card into the PCMCIA interface slot on the
processor module.
b. Perform the software installation.
Menu
See "Forced Installation/Upgrade of System Software" in Maintenance and
Troubleshooting for more details on this procedure.
7 Program the system.
If the current system programming is to be used in the upgraded
system, see "Completing the Upgrade" later in this chapter.
If the system is to be re-programmed, see the System Planning Forms
and System Programming .
8 Test the system.
See Chapter 7, " Initializing and Testing the System ."
9–8
Upgrading the System